💄 i18n: shorten channel search placeholder and update i18n

Replaced the verbose placeholder “Search channel ID, name, key and API address ...”
with a concise version “Channel ID, name, key, API address” in
`ChannelsTable.js` and synchronized the corresponding i18n entries.

This improves readability and keeps UI text consistent across languages.

web/src/components/table/ChannelsTable.js

@@ -1726,7 +1726,7 @@ const ChannelsTable = () => {
               <Form.Input
                 field="searchKeyword"
                 prefix={<IconSearch />}
-                placeholder={t('搜索渠道的 ID，名称，密钥和API地址 ...')}
+                placeholder={t('渠道ID，名称，密钥，API地址')}
                 className="!rounded-full"
                 showClear
                 pure